2858257 has 4 divisors (see below), whose sum is σ = 2878960. Its totient is φ = 2837556.

The previous prime is 2858249. The next prime is 2858263. The reversal of 2858257 is 7528582.

2858257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7528582 = 2 ⋅3764291.

It is a cyclic number.

It is not a de Polignac number, because 2858257 - 2³ = 2858249 is a prime.

It is a Duffinian number.

2858257 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2858357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10143 + ... + 10420.

It is an arithmetic number, because the mean of its divisors is an integer number (719740).

2^2858257 is an apocalyptic number.

It is an amenable number.

2858257 is a deficient number, since it is larger than the sum of its proper divisors (20703).

2858257 is a wasteful number, since it uses less digits than its factorization.

2858257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20702.

The product of its digits is 44800, while the sum is 37.

The square root of 2858257 is about 1690.6380452362. The cubic root of 2858257 is about 141.9167832195.

It can be divided in two parts, 28 and 58257, that added together give a palindrome (58285).

The spelling of 2858257 in words is "two million, eight hundred fifty-eight thousand, two hundred fifty-seven".